Improvement in machines for grinding cards



' @atten gisten @nicht @fitta SAMUEL Cr. LADD AND GEORGE W. CROWN, OF LOWELL, MASSACHUSETTS. Leners Patent No. 63,165, aan Mms 26,1667.

dige Srlgetule rifinita ittica titties' tant mit uniting peut nt tige time TO ALL WHOM IT MAY CONCERN:

Be it known that we, SAMUEL G. Lann and Grenen W. Gnown, both of Lowell, in the county of Middlesex, and State of Massachusetts, have invented certain new and useful improvements in the Machinery or Apparatus which is used for Grinding the Card Teeth of Carding' Cylinders or the top flats.of carding engines., of which -the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specifica-tion, in which.-

Figurc 1 is a central longitudinal section.

Figure 2,.au end elevation; and v Figure 3 represents avtransverse section of our grindercylinder B, as applied to a frame for grinding the card teeth of a large cylinder, or alsmall cylinder, or the top flats of carding engines. I

Our invention consists, vfirst,V in the employment of two separate'central shafts, A and C, arranged lwithin thehuhs It and dof the grinder cylinder D, when the said hubs are made Ato slide longitudinally on the central shafts, which shafts have no longitudinal motion, but are made to rotate in suitable bearings or journal-boxes near their outer ends. Our invention also consists vin the employment of a lateral cam on the shaft A, or 'a lateral cani-groove, g, formed in the substance of said shaft, with a screw, 7L, or other suitable device, passing through one side' of the hub k, or connected therewith, to engage with the lateral cam or the cam groove g, to

'produce a positive, even, and equal longitudinal reciprocating motion to the grinder cylinder D when rotating;

And our invention consists in providing a longitudinal key-way or groove,f, in the side of the. shaft C, or in the substance of the hub g next to the shaft, and a screw, e, or other suitable device passing through the side 0f the hub g into the key-way, 'or projecting from the periphery of the shaft and entering-the groove or key-way in the hub, for the purpose of connecting' the hubv and shaft, so that when the shaft rotates the hub and cylinder shall also rotate; 'but'the hub' must slide longitudinally on theshaft, while both shaft and hu'band also thecylinder rotate together. Aipullcy, F, is fitted and fastened to' the outer end of the shaft C', and 'a pulley, G, to .the outer end of the shaft A. AOutside of the bearings E collars care fittcdvand fastened to each-of the shafts A and C inside of the bearings E. These pulleys and collars prevent any longitudinal reciprocation of the shafts when said shafts, or either of them, vare rotating. The pulley F providesffor the reception of power and rotary motion to the shaftv C and the cylinder by a belt or banid running from a suitable rotating drum or pulley on to the pulley F. I If the shaft C and the 4cylinderwere rotated at proper 'speed to grind card teeth, and the shaft A was at rest,'the longitudinal reciprocating motion of the cylinder would'be as rapid as its rotation, which would be liable'to injure the machine and injure or spoil the card teeth. To prevent any such injury to the machine or the card teeth we run a belt from a suitable rotating drum or pulley on to the pulley Gr, on the outer end of the shaft A, and drive the latter shaft considerably slower, or a less number of revolutions per minute, thanthe shaft C and the cylinder for the rotary motion of the shaft'C, and the cylinder connected with the hubs d and lc causes 'the end of thc screw t which enters the ca`mroovc r, to follow said cam-Oioove round the shaft A and mov@ i v e the cylinder longitudinally once each way at 4every revolution of the shaft C and the cylinder when the shaftA is at rest. Any rotary motion of the shaft A, which contains the cam-groove g, diminishes the reciprocating motion of the cylinder, ancha proper rotary motion of the shaft A, either slower or faster than theshaft' C, will produce the desired longitudinal reciprocation of the cylinder, and any change in` the reciprocating vaction of said cylinder may be effected by increasing or diminishing the velocity or speed of thc shaft A, as above stated By the use of our improvements the teeth of card vcylinders may be ground more evenly andlnearer to the needle point than by any card grinder now in use, thc grinder cylinder being enough longer than the card cylinder to allow of ample reiprocation and still continue its equal and even grinding operation on the teeth .the whole length of the card cylinder, doing its work so perfectly as to obviate the necessity cf strichling the card after grinding, and leaving no wire edges on the pointed ends of the teeth. Our improved card grinder is Well adapted to grinding large cylinders H or small cylinders I, or top flats the latter of which are -uloved across the top of the grinder cylinder transversely, all'as shown in iig. 3 of the drawings; whereas, in the use of the card grinder patented by Jonathan Parker, March 3, 1857, and improved andpatented by Charles Hardy, February 5, 1861, in the foruier invention the short grinder cylinder performs' more grinding at the ends of the Card cylinder than at the middle portion, and leaves the surface'rounded from end to end. In the latter invention nd improvement the shafts G and E11-re so long as to spring and olloiv'the grinder' D to sog when in the middle fthe traversing shaft, and thereby grind the toothed surface hollow from end to end und otherwise very uneven.V

n the use of any of the ordinary card grinders the lateral 'reciprocotionof the grinder' cylinder' is unequal, ence imperfect in the operation, grinding more in some places thon in others, and causing the card topert'orm nperfeet Work. In grinding the main cylinder of o carding engine we place the grinder cylinder in adjustable eorings on the frame of the carding engine, in close proximity tothe points of thecerd teeth, and apply power nd motion, by belts from some pulleys on the cardiug engine, on to the pulleys Fund Grof the grinder cylinder. n grinding the smaller curding cylinders 'the grinder cylinder is placed in adjustable bearings on u grinder 'ame constructed und arranged for grinding the teethl of small' cylinders andtop lats. The smallr car'd cyliners rotdte side by side with the grinder cylinder, and near enough together for the grinder cylinder, which is wered on its periphery with coarse emery, to grind'the points of the card teeth on said small cylinder or cylin-` ars. The points of the card teeth on the top flats of earding engines are ground by moving the top Hats (one a. time) transversely across theA upper surt'oceof the grinder cylinder on guides, shown in fig. 3, when said finder cylinder is rotating, und reciprocating longitudinally. VIt will therefore be understood that our improved rrd grinder may be used for'grinding the teeth of lergefcard cylinders or smelll cylinders, or of the top flats, 1d it con be changed from one frnme to another und curry with it'the best reciprocatingr device for the purpose ver before used. l

Hoving fully described our invention and its operation, what we claim as new, and desire to secure hy etters Potent of the United States, is-

'l'hc two centrol shafts A ,and C, revolving at diierent velocities, causing; the grinding cylinder to revolve y means of the hub d, and to reciprocate longitudinally by means of the hub c','groove g, pin h, slotf, and pin in the manner en'd for the purpose substantially os described.

.S. G. LADD, 4 GEO. W. CROWN. Witnesses:

RosWELL BLANCHA-Ri C. C. LADD. 

